Mechanical Testing

What is mechanical testing?

Mechanical testing reveals elastic and inelastic behavior of a material when force is applied. A mechanical test shows whether a materials or part is suitable for its intended mechanical applications by measuring elasticity, tensile strength, elongation, hardness, and fatigue limit.

What mechanical testing measures

An axle fights the pull of a low tire, a nail penetrates a hardwood block, an aircraft rivet battles against windspeed at 30,000 feet. Stork’s mechanical testing programs provide the data companies need to build products that perform as expected – day after day, encounter after encounter.

How TPS Consulting Engineers conduct mechanical testing

The instruments and machinery you’ll find in TPS’s mechanical testing department include universal test machines, microhardness testing and hardness testing machines, bend and fatigue machines, as well computers featuring programmable software. Our highly trained scientists, engineers, and technicians use these devices to run mechanical testing programs for clients in paper, automotive, biomedical, commercial, oil and pipeline, primary metals, construction, and other industries.

An SMT mechanical testing program can include:

Hardness Testing

Hardness testing is the measure of how resistant solid matter is to various kinds of permanent shape change when a force is applied. SMT performs the following hardness testing methods:

  • Rockwell standard testing
  • Rockwell superficial testing
  • Knoop & Vickers microhardness testing
  • Brinell hardness testing

Tensile Testing

Tensile testing subjects a sample to uniaxial tension until it fails. SMT tensile testing capabilities include:

  • Wedge tensile testing
  • Axial tensile testing
  • Weld tensile testing
  • Castings tensile testing
  • Elevated temperature tensile
  • Tensile testing for machined specimens
  • Full-size tensile testing and yield tensiles, plus heat treat capabilities

Torque Testing

Torque testing is the tendency of a force to rotate an object about an axis. SMT can perform torque testing on most hardware and fastener products.

Fatigue Testing

Fatigue testing is performed on parts and materials to simulate the progressive and localized structural damage that occurs when a material is subjected to cyclic loading. SMT’s fatigue testing methods include:

  • Fracture toughness testing, a measure of the fracture resistance of a material containing a crack.
  • Rotating beam fatigue testing
  • Strain-controlled axial fatigue testing
  • Stress-controlled axial fatigue testing

Charpy Testing

The Charpy impact test, also known as the Charpy v-notch test, is a standardized high strain-rate test which determines the amount of energy absorbed by a material during fracture. SMT conducts:

  • Sub-size Charpy impact testing
  • Standard Charpy impact testing

Bend Testing

Bend testing determines the ductility or the strength of a material by bending the material over a given radius. SMT performs bolt bend testing, weld bend testing, and raw materials bend testing.

Proof Load Testing

Proof load is often used interchangeably with yield strength; it refers to the tension-applied load that a test sample must support without evidence of deformation. Proof load testing can be done on nuts, bolts, components, and assembled products. Methods include:

  • Tension testing
  • Compression testing

Shear Testing

Shear strength measures a material’s response to shear load, a force that tends to produce a sliding failure on a material along a plane that is parallel to the direction of the force. SMT performs shear testing on bolts, rivets, pins, and other products:

  • Single shear testing
  • Double shear testing

Washer testing and other testing

SMT provides full-scale washer testing, both on inch and metric washer products, as well as on other hardware and fastener products. Mechanical testing laboratory methods for washers include:

  • Microhardness for case
  • Core hardness
  • Twist testing
  • Compression testing
  • Interlocking testing
  • Temper testing
  • Clamping testing
  • Deflection testing
  • Surface roughness testing
  • Direct tension indicator washer tests